package com.vmladenov.cook.core.db;

import java.security.MessageDigest;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.vmladenov.cook.core.RestHelper;

public final class UserServiceHelper extends WebServiceRepository
{
	private final String servicePath = "UserService/";

	@Override
	protected String getServicePath()
	{
		return servicePath;
	}
	
	private String convertToHex(byte[] data)
	{
		StringBuffer buf = new StringBuffer();
		for (int i = 0; i < data.length; i++)
		{
			int halfbyte = (data[i] >>> 4) & 0x0F;
			int two_halfs = 0;
			do
			{
				if ((0 <= halfbyte) && (halfbyte <= 9))
					buf.append((char) ('0' + halfbyte));
				else
					buf.append((char) ('a' + (halfbyte - 10)));
				halfbyte = data[i] & 0x0F;
			}
			while (two_halfs++ < 1);
		}
		return buf.toString();
	}

	public String SHA1(String text)
	{
		MessageDigest md;
		try
		{
			md = MessageDigest.getInstance("SHA-1");
			byte[] sha1hash = new byte[40];
			md.update(text.getBytes("iso-8859-1"), 0, text.length());
			sha1hash = md.digest();
			return convertToHex(sha1hash);
		}
		catch (Exception e)
		{
			return "";
		}
	}

	public String registerUser(String userName, String password, String email)
	{
		String url = siteUrl + servicePath + "RegisterUser";
		JsonObject param = new JsonObject();
		param.addProperty("userName", userName);
		param.addProperty("passwordHash", SHA1(password));
		param.addProperty("email", email);
		JsonElement element = RestHelper.JSONPost(url, param);
		if (element == null) return "";
		return element.getAsJsonObject().get("RegisterUserResult").getAsString();
	}

	public long loginUser(String userName, String password)
	{
		String url = siteUrl + servicePath + "LogIn";
		JsonObject param = new JsonObject();
		param.addProperty("userName", userName);
		param.addProperty("passwordHash", SHA1(password));
		JsonElement element = RestHelper.JSONPost(url, param);
		if (element == null) return -1;
		return element.getAsJsonObject().get("LogInResult").getAsLong();
	}

}
